Nikolay Mehandjiev Todor Stoitsev Olaf Grebner Stefan Scheidl Uwe V. Riss End-User Development for task management: Survey of attitudes and practices. 166-174 2008 VL/HCC http://dx.doi.org/10.1109/VLHCC.2008.4639079 conf/vl/2008 db/conf/vl/vlhcc2008.html#MehandjievSGSR08